Refrigerating apparatus



H. B. HULL REFRIGERATING APPARATUS Filed 001.. 23, 1923 f; ummm-@inY- l 1 Patented Oct. 13, 1925.

UNITED STATES PATENT oFF-lcs.

HARRY B. HULL, OF DAYTON, OHIO, .ASBIGNOB TO DEMO-LIGHT COHPANY,'OF DAYTON,

` OHIO, A CORPORATION Ol' DELAWARE l maremma urmrus.

l applicati@ mea october as, im. semi in. 670,353.

To all whom t may concern:

Be it known that I, HARRY B. HULL, a citizen of the United States of America, residing at Dayton, county of Montgomery,

State of Ohio, have invented certain new and useful Improvements in Refrigerating Apparatus, of which the following is a full, clear, and exact description.

The present invention relates to valves and particularly to valves which control the liquid refrigerant passing into an evaporator of a mechanical refrigerator.

One of the objects of the present invention is to provide a valve which will ca'usethe 15.withholding of a iuid until said fluid 1s at least partially liquified and which then permits the passing of the iuid more or less as a liquid. The construction includes a movable casing for containing a liquid which, after it collects a quantity of liquid willbe moved by the weight of the liquid to open the valve.

Other and further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawing, wherein a preferred form of one embodiment of the present invention is clearly shown.

In the drawings:

n Fi 1 is a side view partly in, section showlng the improved valve.

Fig. 2 is a view 'taken on line 2-2 of Fig. 1.

Fig. 3 is a view showing a refrigerator with the present type valve applied thereto.

Referring ,to the drawing, is a refrigerator cabinet comprising a food compartment having doors 21 and 22 and a cooling compartment 23 having a door 24. An evaporator 25 is carried within the cooling compartment 23. The cabinet 20 is also provided with a machine compartment 26 in which there is located a. refrigerating machine including a compressor 27 driven by a motor 28 and a condenser 29. The refrigerant-to be compressed is drawn from the evaporator 25 through a pipe 30 into the compressor 27 where it is compressed and then cooled and liquiied by condenser 29,'

the liquid refrigerant passing from the condenser through pipe 32. The refrigerating machine as is so far described, is substantially the same as that shown in the patent to Bechtold, et al., No. 1,276,612, patented August 20, 1918, and therefore no further ,explanation of same is deemed necessary.

The liquid refrigerant pipe 32 is connected with an inlet of a liquid control valve 33 .by a coupling 39. Valve 33 controls the amount of liquid passing into tube 35 which is connected with the outlet of the valve by coupling 38; Tube -35 supplies the refrigerant to the evaporator 25.

The 1i uid control valve comprises an end plate 37 aving an inwardly projecting boss 40. Boss 40 is provided with passage 41 and acommunicating passage 42 leading to the interior of the coupling 38. Boss 40 is recessed at 44 to receive a gasket 45 and the end of plug 46. Bolt 47 projects'through vthe passage 41 and is screw threaded into `the plug 46 for maintaining said plug in a fixed position. The plug 46 is also recessed and forms a continuation for the passage 41, the diameter of the passage 41 being larger than the diameter of the bolt 47. The end of the passage 41 is sealed by a washer 48 and a gasket 49.I -A port 50 is provided in the plug 46 in communication with the passage 41 and which is adapted to register with a port 51 of an oscillating member 52 which is pivotally mounted upon the plug 46.- The pivoted member 52 is screw threaded to receive one` end of a rod 53 which projects through an oscillating liquid receiving member 54 and the other end of said rod is removably secured to themember 54 between the bellows 57 and the end plate 37.

The supporting bracket 60 is secured to the floor of the machine compartment 27 by bolts 65. Member 54 carries a bracket 66 which is lconnected by spring 67 to a bolt 68 which in turn is adjustably connected with the supporting bracket 60 by wing nut 69.

The operation of the device is as follows:

Assuming that the liquid control valve 33 .is in the position shown, liquid refrigerant passing from the condenser 29 to the pipe 32 will enter within the casing 58 through the coupling 39. The refrigerant will pass from the casing through the ports 51 and 50, which are now registering, into the paspllng 38, pipe 35 and into the evaporator 25. At the same time the gaseous refrigerant will be drawn from the evaporator through the pipe into the compressor 27. The spring 67 normally tends to swmg the casing 58 and likewise the pivoted member 52 upwardly about the plu 46. However, the Weight of the liquidl within the cas1r17gh58 counteracts the force of the spring 67.

the level of liquid within the casing recedes the spring 67 overcomes the force of the weight of the liquid and rotates said member 52 whereby the port 51 is moved out of registering position with the port 50. It is therefore apparent that'it is necessary that a predetermined quantity of liquid is present within the casing 58 before the ports 50 and 51 can register. This quantity of liquid within the casing 58 can be regulated by adjusting the tension of the spring 67.

The metal bellows 57 is somewhat resilient and tends to force the member 54 endwise and f likewise force the rod 53 and member 52 endwise whereby a portion of the bearing of the member 52 will be maintained in engagement with that portion of the bearing surface of the plug 46 adjacent port 50. This action tends to seal the port 50 so that no refrigerant can pass through it unless port 51 registers with it.

It will be apparent from the foregoing description that there has been provided a valve for refrigerating systems .which will insure that a predetermined quantity of liquid is present before any can pass therethrough. The ports 50 and 51 must rggister before refri erant can pass through the valve and be ore the ports 51 and 50 register it is necessary to have a predetermined quantity of liquid within the casing 58.

The present type of valve can be veryl accurately adjusted. The casing 58 is arranged to carry a large quantity of liquid which provides a device having relatively great working forces, which are readily adjustable. The adjustment can be readily made by manipulating the wing nut 69 which is located on the exterior of the valve. Also the operation of the valve can be observed and checked, the movement of the casing indicating the functioning of the valve.

The valve can be readily disassembled and it is only necessary t0 remove nut 55 and bolts 61, then the rod 53, the end of plate 37, and the elements therebetween can be Vreadily removed from within the casing as a unit.

While the form of embodiment of the invention as herein disclosed, constitute a preferred form, it is to be understood that other forms might be adopted, all coming within the scope of the claims which follow.

What is claimed is as follows:

1 In a liquid How controlling device of the class described, a stationary end plate; a hollow oscillating liquid receiving member; a flexible connection.l between said member and said end plate and valve mechanism located Within the space enclosed bv said liquid receiving member and said exible connection for controlling the flow of liquid into, and out from said liquid receiving member. l

2. In aliquid flow controlling device o the class described, a stationary end plate; a boss extending from said end plate; an oscillating member', and passages and ports in said member and in said boss adapted to communicate with and to be out of communication with one another, to thereby control the flow of liquid through said boss and through said oscillatin member; a hollow oscillating liquid receiving member; a exible connection between said liquid receiving member and said end plate; and a connecting member between said liquid receiving member and said oscillating member for imparting oscillatory movement to said oscillating member.

3. In a liquid flow controlling device of the class described, a stationary end plate; a boss extending from said end plate and having a passage therethrough; a laterally extending plug having a passage communieating with the passage in said boss, and having also a port; an oscillating member supported on said boss, and having a port adapted to communicate with and to move out of communication with the port in said plug; a hollow oscillating liquid receiving member; a flexible member between said liquid receiving member and said end plate and secured to both; and a rod whereby said liquid receiving member and said oscillating member are connected together so as to move in unison.

4. In a liquid How controlling device of the class described, a stationary end plate; a hollow oscillating liquid receiving member; a hollow metallic bellows between said liquid receiving member and said end plate and connected to each of said members; valve mechanism located within said bellows and adapted to control the flow of liquid into'and out from said oscillating member; and means whereby movement of said liquid receiving member is communicated to said valve mechanism to operate the same.

In testimony whereof I hereto affix my signature. 

